Pipe-bender



G. R. MOORE AND C. S. LEONARD.

PIPE BENDER.

APPLICATION FILED OCT 2.1919.

Patented Aug. 10, 1920.

2 SHEETS-SHEET 1.

Emma 06S George R. Moore G. R. MOORE AND C. S. LEONARD.

V PIPE BENDER.

APPLICATION FILED OCT 2,1919.

latented Aug. 10, 1920.

2 SHEETS-SHEET 2.

Q J o m mm H C m LU Q hl 1 T Q M w W a, 00 q l I I. My 0 f0 5 II 4 1 OJ.L 4 1 gvvu c/Mioms George .H .Moore & ChesterSLecmard UNITED STATESPATENT OFFICE.

GEORGE E. MOOREAND CHESTER LEONARD, F PHILADELPHIA, PENNSYLVANIA.

PIPE-BENLDER.

Specification of Letters Patent.

Patented Aug. 10, 1920.

Application filed October 2, 1919. Serial No. 327,867.

ful Improvements in PipeBenders, of which the following isjaspecification.

The object of our present joint invention is the provision of a pipebender in which the power for performing the bending func- Etion isapplied at the point where it is needed, and in that way the impositionof undue strain, on the bender as a whole is obviated, and any tendencyto wrench the" bender as a. whole from its fastenings is averted.

To the attainment of the foregoing, the invention consists in theimprovement as hereinafter described and definitely claimed.

In the accompanying drawings, hereby made a part hereof:

Figure 1 is a plan view of the handoperated embodiment of our invention.

Fig. 2 is a side elevation of the same.

Fig. 3 is a plan of a power-operated enibodiment.

Fig. 4 is a side elevation of said embodimerit.

Fig- 5 isan enlarged detail view showing the relation of the detent tothe segmental ratchet bar.

Similar numerals designate corresponding parts in Figs. 1 and 2, towhich reference will first be had. 7

In the present and best practical embodi- ,.ment of our invention ofwhich we are cognizant, a segmental ratchet bar 1 is fixed to amainframe 2, and saidmain frame 2 is de signed to be secured in positionin any approved manner. Also fixed to the mam frame 2' is a bending form3, preferably,

ment of the said lever in'the direction indicated by arrow in Fig. 1.

Fulcrumed at an intermediate point of 1ts length to the lever 6, is apipe-bending lever 8, on the inner arm of which is pivotally mounted at9 a pipe-bending shoe 10. A

pipe 11 is shown in Figs. 1 and 2 in position to be bent.

At its outer end the lever 6 is equipped with a lateral arm 12, and inthe said arm 12 and also in that arm of the lever 8 remote from theshoe10 are journaled nuts 13 and 14, the bores of which are oppositelythreaded. A

Extending through and engaging the threaded bores of the nuts 13 and 11, are

oppositely disposed threaded portions 15 and 16, respectively, on apower-applying shaft 17 having at its outer end a handle 18. It is to beunderstood here that it is within the purview of our invention to employany power-applying means for accomplishing the bending of the pipe incooperation with the lever 8, shoe 10 and form 3.

In the practical operation of the bender of Figs. 1 and 2, the pipe ispositioned as illustrated, and the lever 6 is swung in the directionopposite to that indicated by the arrow, after which the shaft 17 isactuated to draw the outer arm of the lever 8 outwardly and thrust theinner arm of said lever Sand the shoelO inwardly, this latter bringingabout the powerful bending of the pipe without any tendency to imposestrain upon the bender as a whole, with the attendant liability ofwrenching the frame 2 from its fastenings as is the case when a verylong lever is employed for bending purposes and power is applied to theouter arm of the said lever. The operation described is repeated as manytimes as are necessary,and from this it will be understood that throughthe medium of our im provement the pipe is bent in a step by stepmanner. In the embodiment illustrated in Figs. 1 and 2, thepower-applying means is in the form of an attachment, and includes theshaft 17, a section 19 slipped on the outer arm of the lever 8 in thesame manner as the long lever handle heretofore employed, and a sectionthat forms the before-mentioned lateral arm 12 on the lever 6,: thelatter section being bolted at 12 to the lever 6. In the, said sectionthe nuts 13 and 14, before mentioned, are mounted. It will be readilyappreciated that incidental to the bending operation, the detent '7, bycooperation with the segmental ratchet bar 1 will preclude casualmovement of the lever 6 in the direction of the arrow in Fig. 1. Saiddetent 7 and ratchet bar 1 will not, however, interfere with movement ofthe lever 6 in the direction opposite to that indiing operation. I

ally.

cated by the arrow, as when-it is necessary to position the shoe 10 tora lresh bend- In the power embodiment shown igs. 3,

a and 5, a fluid pressure cylinder 18 is carried on thelevert and a bellcranl; 17 is tulcrumed at 17 on said lever (i One arm of the bell crank17 is connected with the piston 17 in the cylinder 18, and the other armor said bell crank is connected-through a link 15 with a pipe-bendinglever 8 iulcruined on the lever 6*; the said pipe-bending lever 8 havingpivoted at 9 -thereto a bending shoe 10 On a lower portion 16 ofthe'lever 6 is carried a detent '7, weighted,

' by preference, in the manner shown in Fig.

5, and designed to cooperate with the segmental ratchet bar 3 inpreventing casual movement of the lever 6 in the direction indicated byarrow in Fig. 3.

Thepractical operation of the power em- I bodiment is substantially thesame as that of the hand-operated embodiment a'pe', the lever 6 is swungmanually on its center to position the shoe 1O relatively to the pipe tobe bent, and then fluid under pressure,-

In the power embodiment, as well as in the hand-operated embodiment, thepipe is bent in a step by step manner through the operation of the shoel0 -and by the applica tion of stress to said shoe'and without'tendcncyto wrench the organized mechanism as a whole.

The lever 6 in Figs. 1 and 2, and the lever 6 in Figs. 3 i0 5, serves toposition the bending shoe, and therefore each of said levers may beproperly denominated a positioning lever. r

Having describedour invention, what we claim and desire to secure byLetters-Pat 'fentis;

1. an organized pipe-bending mechanism comprising in combination a form,a pos tioning lever, means tor holding the positioning lever againstswinging movement in one direction, pipe-bending means carried by andmovable on the positioning lever, and means on the positioning lever toactuate the pipe bending means individu '2. An organized pipe-bendingmechanism comprising in combination a form, a positionin'g lever,means'for holding the positioning' lever against swinging movement inone direction, a pipe-bending lever carreee aief comprising incombination a form, a positioning lever, means for holding thepositioning lever against swinging movement in one d rection, apipe-bending lever carried by the positioninglever, a bending shoe onsaid bending lever, and means on the positioning leverto actuate thepipe-bending lGYQYlHCllVlClLlZLlly-J r V An organized pipe-bendingmechanism comprising in combination a form, a fixed segmentalratchetbar, a positioning lever, a detent on the positioning lever forcooperation with the segmental ratchet bar to hold said lever in variouspositions against move ment' in one direction, pipe-bending meanscarried by the positioning lever, and means on the positioning lever toindividually ac-. tuate said pipebending means. 7

5. An organized pipe-bending mechanism comprising in combination a form,a stationary segmental ratchet bar, a positioning lever, a detent on thepositioning lever for cooperation with the segmental ratchet bar to holdsaid lever in various positions against movement in one direction, apipe-bending lever. attached to the positioning lever, a pipe-bendingshoe on said bending lever,

and means to individually actuate the pipebending lever; said actuatingmeans being attached to the positioning lever.

6.9m organized pipe-bending mechanism comprising in combination a form,a positioning lever, means for holding the said lever against movementin one direction, a bending lever on the positioning lever, an armattached to the positioning lever, a section applied to the bendinglever, oppositely threaded nuts journaled in said arm and section, ashoe on the bending lever, and an actuating shaft having oppositelythreaded portions extending through and engaging said nuts. I

7. An attachment for a pipe-bending machine comprising an arm adapted tobe attached to a positioning lever, a section having a socket adapted toreceive a bending lever, oppositely threaded nuts journaled in said armand section, and an actuating shaft having oppositely disposed threadsarranged in said nuts. I

' 8. The combination of a positioning lever,

a bending lever fulcrumed on said positionlever, and a threadedactuating shaft connecting said bending lever'and the positioning leverand having a threaded engage ment with one of said mentioned'elements.In'testimony whereof we afiiX our signatures. e

GEORGE R; MOORE. onnsrnn s. LEONARD.

